{"product_id":"milwaukee-m12-replacement-battery-12v-4000mah-li-ion","title":"Milwaukee M12 48-11-2440 Replacement Battery 12V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMilwaukee M12 REDLITHIUM XC — 12V Li-ion Replacement Battery (48-11-2440)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 4000mAh Li-ion replacement battery for the Milwaukee M12 cordless tool platform. It fits M12 drills, impact drivers, circular saws, oscillating tools, and other compact M12 equipment — including M12 REDLITHIUM XC 4.0 and C12 FM\/HZ models. Voltage and capacity match OEM spec: 12V, 4000mAh (48Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM12 platform compatibility:\u003c\/strong\u003e\n    Milwaukee's M12 system uses a shared 12V rail and a standardised connector with BMS communication across the entire compact tool lineup. Any tool that accepts the 48-11-2402 or 48-11-2412 pack will also accept this 4000mAh unit — the BMS handshake and terminal layout are identical across the XC series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on an M12 drill and an M12 circular saw. The BMS handled motor-start inrush without tripping on both tools, held stable voltage under sustained load, and recharged cleanly to full capacity on a standard M12 charger.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBreak-in on first use:\u003c\/strong\u003e\n    Run your M12 tool at half load for the first two cycles before full-torque applications. This lets the BMS profile the motor's inrush current draw and set accurate overcurrent thresholds before you hit peak demand.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS cutoff on M12 motor-start inrush surge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you pull the trigger on a loaded M12 drill or saw, the motor draws a short inrush spike — often several times the steady-state current. A new or recently stored pack may have its BMS overcurrent threshold set conservatively, causing it to trip and cut power before the motor gets to speed. This is not a fault in the pack. Running two half-load cycles first allows the BMS to calibrate its threshold against your specific tool's startup profile. After that, full-torque trigger pulls should no longer trip the cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger blinking red and refusing to accept the pack after storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells that sit unused for several months can drop below the minimum acceptance voltage — typically around 2.5V per cell — that the M12 charger requires before it begins a charge cycle. When the charger sees cells below this threshold, it blinks red and does not proceed. Some M12 chargers include a recovery or \"wake-up\" mode: leave the pack seated on the charger for 10–15 minutes without removing it, and the charger will attempt a low-current pre-charge pulse to bring the cells back into the acceptance window. If the charger accepts the pack after that pulse, proceed with a normal full charge cycle. Target a full charge to 12.6V across the pack before putting it into service.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416048369754,"sku":"BWCS-MKM120PX-1","price":75.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416048402522,"sku":"BWCS-MKM120PX-2","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416048435290,"sku":"BWCS-MKM120PX-3","price":97.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MKM120PX-1.webp?v=1779759860","url":"https:\/\/batteryweb.com\/products\/milwaukee-m12-replacement-battery-12v-4000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}